IBM 3745 Problem Determination Manual page 328

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Token-Ring Problems
Table 12-3 (Page 2 of 3). Token-Ring - Ring Status Indicator Description and Action
Ring Status Indicator
m
SIGNAL LOSS ON and
HARD ERROR ON and
TRANSMIT BEACON ON
SIGNAL LOSS OFF and
HARD ERROR ON and
TRANSMIT BEACON OFF
LOBE WIRE FAULT
AUTO REMOVAL ERROR 1
Description and Action
• Unplug the TIC cable from the IBM 8228.
• Ask the host operator to activate the link for this TIC.
• Press F5 to start refresh.
- If an OPEN ERROR message is displayed in field m of the screen,
perform the action required for that message.
- If LOBE WIRE FAULT is ON (field
m)
with no message on linem,
plug the TIC cable in again and refer to the Token-Ring Network
Problem Determination Guide, in c.onjunction with page 12-11 of,
this guide. .
- If LOBE WIRE FAULT is OFF (field
m)
with no message on line
II,
plug the TIC cable in again. Use the MOSS ELD function to
analyze the TRSS BERs type 15 related to the last encountered
token-ring problems. By using the ELD detail screen, you may find
additional information which can help you fix the problem. If not
yet fixed then
ca
and give BER information.
• Ask the host operator to activate the link for this TIC.
• Press F5 to start refresh.
• Analyze the information displayed on the screen using the Token-Ring
Network Problem Determination Guide, in conjunction with page 12-11
of this guide.
The TIC has detected an open or a short circuit in the lobe data path.
With no OPEN ERROR message in field
II
• Check the cable connected to the IBM 8228. Reconnect if necessary.
• Ask the host operator to activate the link for this TIC.
• Press F5 to start refresh.
- If LOBE WIRE FAULT remains ON, use another IBM 8228 socket.
- Ask the host operator to activate the link for this TIC.
- If LOBE WIRE FAULT remains ON, change the cable to the IBM
8228.
- Ask the host operator to activate the link for this TIC.
- If LOBE WIRE FAULT remains ON, use the MOSS ELD function to
analyze the TRSS BERs type 15 related to the last encountered
token-ring problems. By using the ELD detail screen, you may find
additional information which. can help you fix the problem. If not
yet fixed then
~
and give BER information.
The TIC detected an internal hardware error during the beacon
auto-removal process and removed itself from the ring.
• Ask the host operator to activate the link for this TIC.
• Press F5 to start refresh.
• If the problem persists, use the MOSS ELD function to analyze the
TRSS BERs type 15 related to the last encountered token-ring
problems. By using the ELD detail screen, you may find additional
information which can help you fix the problem. If not yet fixed then
~
and give BER information.
Chapter 12. Token-Ring Interconnection (TRI) Problems
12-7